\(\begin{array}{l}\quad x^2 + y^2 + 8x - 4y - 5 =0\\\Leftrightarrow (x^2 + 8x + 16) + (y^2 - 4y + 4) = 25\\\Leftrightarrow (x+4)^2 + (y-2)^2 = 25\\\Rightarrow (C)\ \text{có tâm $I(-4;2),$ bán kính $R = 5$}\end{array}\)
Tâm đường tròn:
$I\Big(\dfrac{8}{-2};\dfrac{-4}{-2}\Big)=(-4;2)$
Bán kính đường tròn:
$R=\sqrt{4^2+2^2+5}=5$
Vẽ anime/ chibi Ai hong có nhóm hong nhóm tui đang tuyển thành diên nè dô đi :3 Trưởng nhóm nà bn kêmm xinh gái lắm :33
cho x/2008=x/2009=x/2010.chứng minh rằng 4(x-y)(y-z)=(z-x)² Giúp mình vs ạ mình cần gấpp
Chọn một hóa chất nhận biết các dung dịch không màu sau: NH4NO3, MgSO4, C2H5OH, Na2CO3, CH3COOH, Al2(SO4)3và (NH4)2SO4
Các bạn chỉ mình mấy chữ viết tắt là gì ạ ở innetviet
Cho hpt {2x+by=-1 {bx-2ay=1 .Biết rằng hệ phương trình có nghiệm là -1 ,2 khi đó a-b bằng bao nhiêu
vẽ anime y/c :đẹp đẹp và đẹp (nhớ phải đẹp) line/màu tuỳy (có càng tốt) z thou
1. I’ll be here in a momentif you don’t mind to wait for a couple of minutes. A B C D 2. We get used to workon Sundays without paying. A B C D 3. She is looking forward to see her friends this weekend. A B C D 4. I couldn’tmake my car to startthis morning. A B C D 5.He could not decidewhetherto get a job or studying. A B C D 6. Would you like going to my house for dinner tonight? A B C D 7. If were you, I wouldn’t let the kids to playout inthe street. A B C D 8. I warned them not climb the mountain in such bad weather. A B C D 9. They spent their vacations to teachilliterate people to read and write. A B C D 10. I told you specificallynot writingyour answers in pencil, Peter! A B C D 11. Try encouraging your children to makemoreeffort. A B C D 12. Would you rather camein the morning or the afternoon? A B C D 13.These trees needwater every morning . A B C D 14. They have enough money buy the bigger and more modern than the old one. A B C D 15. She likes her job butdoes not like wear uniforms A B C D 16. He will try to not makethat mistake again. A B C D 17. They speak English well becausethey practisespeak it everyday. A B C D 18. Lan was in a difficult situation, so I agreed lendingher some money A B C D 19. Don’t forget attending our meeting next month on time A B C D 20. I spentmost of time in the train readmy favorite book A B C D 21. I enjoywatching the sun to riseslowly in the morning A B C D 22. Why should you to carry this box? It’s too heavy for you A B C D 23. She said the letter was personaland wouldn’t let me to reach it A B C D 24. It’s impossible for mebeing there before 8.p.m A B C D 25. She suggested taking the plane this evening orgo by train tomorrow A B C D 26. Could you please stopto make so much noise? A B C D 27. It was very kind of you to showing me the way A B C 28. I’m gladhearing that you have make much progress in your study A B C D
Tác giả Nông Thị Tô Hường sinh,mất năm bao nhiêu
làm 2 bài này hộ em ạ , nhanh cnha trc tối nay
Viết chữ kiểu (mọi người muốn kiểu gì cũng được miễn là đẹp)"Cỏ Bốn Lá" Trang trí nữa nha Ai đẹp nhất CTLHN 1 pic kí 1 pic k kí Bằng app
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